The "and Roll" command is an add-on to almost any other square dance move.
If the last part of that move involves body rotation the dancer will
turn
1/4 more as an individual in the same direction.
If there is no prior
body rotation, do not do the roll.
Example 1:
Right and Left Thru and Roll:
All dancers are turning left (in the Courtesy Turn),
so all dancers will individually turn 1/4 to the left.